The file new/wp-admin/setup-config.php is a crucial part of the WordPress installation process. This script is responsible for guiding users through the configuration of their WordPress installation by setting up the wp-config.php file, which contains essential database connection information and other settings necessary for WordPress to operate.
When a user attempts to access WordPress for the first time after downloading the software, if the wp-config.php file is not found, WordPress will redirect the user to new/wp-admin/setup-config.php. Here is what happens during this process:
setup-config.php generates a wp-config.php file with the provided information. This file contains settings like database connection details, authentication unique keys and salts, and other configuration options.
new/wp-admin/install.php) where they can run the installation to set up WordPress fully.
The setup-config.php script has been part of WordPress since its early versions. Initially, WordPress installations required manual configuration of the database settings. The introduction of setup-config.php simplified this process, making WordPress more user-friendly for those without extensive technical knowledge[1].
While setup-config.php provides a user-friendly way to set up WordPress, it's also a potential security risk if left accessible after installation:
wp-config.php and redirecting if it's present.